I've just installed the latest version of iRedMail (0.8.3) and iRedAdmin-Pro-MySQL (1.5.1) in a clean installation of Ubuntu 12.04.When I try edit a domain profile, I get this error:'internal server error'

- Restart Apache web server.- Re-perform the operations which raises "internal server error". iRedAdmin will mail you a HTML file with detailed message about this error.- Forward this email (with HTML file) to "support @iredmail.org". I will check it and let you know why it happened.

You can update "mail_error_to_webmaster =" to False after you got the HTML file, and restart Apache.